Concentrating-table



1. F. MCNEIL.

CONCENTBATING TABLE.v APPLICATxoN FILED 1uLY 2a,1s19.

Patented Feb. 15,1921.

JOHN FRANCIS MCNEIL, OF CLIFTON, ARIZONA.

CONCENTRATING-TABLE.

Specification of Letters Patent. Patented F91). 15, 1921;

Application led July 23, 1919. Serial No. 312,770.

To all whom it may concern Be it known that l, JOHN F. MoNEiL, a citizen of the United States, and a resident of Clifton, in the county of Greenlee and State of Arizona, have invented anew and Improved Concentrating-Table, of which the following is a description.

My invention relates to concentrating tables and while more particularly intended for wet concentration, it can be employed in dry concentration. The invention resides in the system of arranging the riifles and particularly in a bank rilfie and its relation to the remaining riffles.

The invention resides further in the a1'- rangement of a feed disposed at the end ofthe table opposite the discharge as distinguished from a feed arranged along a side of the table, the feed crossing a portion of'my novel system of riifies also, as

will hereinafter more clearly appear.

'I he characteristics of my improved riffle system and feed produce certain distinctive advantages and results among which are the following: Better results in savings are obtained as well as (leaner concentrates and more tonnage per table, while there are less` repairs, less labor and power required for the operation7 and a less number of tables are required for handling a given amount of material on account of the increased tonnage handled per table. Furthermore, the installation does not cost more than systems involving other riiiles; the invention may be embodied in standard tables and with a standard stock rit-He exceptA in the case of my bank rifile. and the feed means coacting with the novel riiile system insures the distribution of the feed to utilize all the ritiles 'and the entire surface and length of table. Again. the arrangement of riffles is such that aV table of ordinary dimensions and standard make is made to constitute in effect two separate and distinct tables in the variation of the riiiies and for the successive treatment of the material.

Referenv e is to be had to the accompanyine' drawings forming a part of this specification. it being understood that the drawings are merely illustrative of one example of the invention. Y

Figure 1 is a plan view of a concentrating table embodying my invention;

Fig 2- is a transverse section on the linel 2 .27 l; i.

. Fig. 3 is a perspective view of my bank riffle;

F ig. 4 is a perspective View of one of the riflies in the second series provided on. the table.

'l`he table A may Vgenerally be of any ap# proved form and supported in any suitable manner, to give it the proper inclination to dispose the head 12 slightly above the discharge end 13 for the concentrates as well as to dispose one side of the table higher than the other to cause the tailings C to flow to and over the lower Side, there being indicated conventionally portions of hangers B, Fig. 2. I provide feed means adjacent to the head k12 and transversely of the table, thev same being in the' form of an elongated distributing box 15 providedy with a hopper 14- for receiving the material to be treated. The numeral 17 indicates the lower side over which the tailings pass. An important feature of my invention consists in a bank riiile 18 and this I dispose oblique to the longitudinal aXis of the table and extending from or adjacent to the head 12 obliquely toward the higher side of the table. I arrange rifiies at both sides of the bank riiiie 18 and of less height than the surface of the table, the two series of riffles being indicated respectively by the numerals and 11. The riflies 10 are disposed parallel to the bank rilfle 18 and therefore. incline upwardly toward the higher side of the table. Those riliies. however, nearer the center of the table will have sufficient length to terminate a material distance from the higher side of the table, thereby allowing ample clearance for the escape of the roncentr'ates and any sand remaining` therewith,.from between the riiiies. The series of rifiies 11 instead of havingthe Obliquity of the riiiies 10 are disposed parallel with the longitudinal axis of the table. It will be observed that the feed device ei'tends across more or less of the riifles 10. The position of the feed and the relation of the se me to the riffles insure an effective distribution of the material over1 the table. rl`he top surface 20 of the bank riffie slopes toward the second series 11 to facilitate the flow'of the material over the bank riliie to prevent accumulation on said top surface. The bank riiiie and the others are in prac- VLice vsecured by screws or other surable fasteningwmeans, the numeral 19 indicat- Clt lll]

Y '9 Y Y 1,368,815

' riflle.

ing holes through which the fasteners are passed. rl'he bank rillie as well as those of the tu'o series are of gradually redu ed height toward the discharge end. j

The box 15 of the feed device has a longitudinal series of holes 21 in a side thereof through u'hich the material may escape and advantageously also, an end escape hole 22.

ln order that the feed*` device may berad- Vjusted so that the receiving end or hopper may"behigherrto a greater or less extent, than the opposite enl depending` on the nature of the material being treated, l .provide adjusting means.V rlhe hopper end of theV througlithe head 12 and having a bent orhookedend 27 embracing the far side of the box from the head 12, there being a block Q8 on the shank of the bolt between the box 15 andthe head 12 so that a tightening ofthe nut' 2G will cause the box to be firmly clamped between the hook 2? Vand the block 28 and hold the box in a given adjustment.

There may be two or three of the oblique rifl'les ltl'betiveen the bank riflie 18 and the riflles 1l to insure a wide distribution of the material to the latter rililes by reason of the angular relation thereto of the oblique Vfeed'toithe irstseries of riiiles 10 is directly to said riilles from the feed means near the rear ends of said rililes 10 and similarly, the feed to the second Vseries of rii'lles 11 by overflow from the first series 10 andover bank riille 18, begins adjacent to the rear ends of Vsaid riilles 11.A Thereby, the concentrating action of all the ritlles begins adjacent tol their rear ends and adjacent tothe head 12 or rear .end of the table, thus giving tho maximum results in the concentrating action. Y rl'lie Obliquity of the bank riflle and the riflies 10 with the forming of 'the pond4 by said bank riflle is particularly effective in preventing loss 4of mineral product by retarding the travel thereof toward the ta iling discharge and permitting` the mineral product to settle and preventing it from passing Yover the bank 'riiiie with the tailings. The Vsloping ofl the topsurface ofthe tant resultl is that I prevent the Water in bank rillle .toward the` parallel riflles 11 prevents the clinging of heavy feed or foreig'n particles and prevents theformation'of slmes'on the top surface. A. further imporpassingl over the bank rilie from be oming rippled and agitated-Which would seriously affect the concentrating-action. 'ln the'operation ofordinary concentrating tables a very material loss of mineral products occurs adjacent to theV medial line of the table by the carryingroff of' concentrates due to the activities that the ivater, Waste material, andniineral products undergo by thetime they reaA h the meelial line .of the table coupled `with theY fact that the depressions in the region referredV to contain a large amount of concentrates. `With my construc- Y tion most of the coarse mineral'is caught by the first series of riiles 10and the'bank riflie 18 due to the fact that they extend obliduely away from the tailings discharge 17 and by the time the mineral reaches thebank riliie and after it has had ampletime and has been subjected to proper conditions forit to Vhave settled on the bottom of the table, it cannotpass over the bank ri'flie but must travelv up 'an'incline to the upper tapered enel ofthe bank riflie and on toward Vthe dischargeend 13 forthe(oncentratesl Thus the concentrates discharging at the VendA of the bank ritlie cannot Vreturn Vto the Waste product or tailings. Any fine mineral pass-` ing over the bank riii'le 18 Vis first subjected tothe small series of said inclined riiiles be- ,tween said bank rii'lle and the riiiies 11.

Y of the material bythe oblique riiiles enables Ine to obtain a very clean mineral product, said ritlles llresulting in minimizing the travelrof Waste 'product `With the remaining concentrates toward the end 13,'said Waste material flowing;` over-the parallel riflies 11 115 to the Waste or tailings sided? of the table. livould state' in conclusionl that While the illustrated exampleconstitutes a practical embodiment of my invention, l do not limit myself strictly tothe mechanicaldetails 120 herein illustrated, since manifestly the 'same can be considerably varied Without departure from the spirit'of the inve'ntionas defined in the appended claims. j

Having thus described my invention, lV claim as new and desire to secure by Letters Y, Patentz'- 'y l fr Y 1. A concentrating table having one longi-V tudnal Aside lower than thev other .for theV discharge of tailings, one end of said table 13G constituting the discharge for the concentrates, feed means at the opposite end of the table-to deliver the material to be treated, a series of ritiies disposed over that portion of the table adjacent to the higher side and extending from the feed end of the table longitudinally of the latter, and disposed obliquely to incline upwardly toward the higher side, those riffles of said series disposed increasing distances from the higher side of the table being of successively increased length so that the riiles of the series terminate on a transverse line drawn obliquely to the higher side, a second series of riflies between the first series of rfles and said lower side of the table and parallel with said side, and a bank riii'le disposed longitudinally of the table parallel with the rilfles of the firstmentioned series and adjacent to those rlftles of said first series near the second series, said bank riiiie and the riflies of the two series being of gradually reduced height toward the discharge end of the table and the top surface of said bank riffle sloping transversely toward the lower side of the table.

2. A concentrating table having one longitudinal side lower than the other for the discharge of tailings, one end of said table constituting the discharge for the cencentrates, feed means transversely disposed at the opposite end of the table to deliver the material to be treated, aV series of riifles disposed obliquely over that portion of the table adjacent to the higher side to incline upwardly toward the higher side, and a second series of rililes between the first series of riiiies and the lower side of the table and parallel with the latter, said feed means being adjacent to the first-mentioned series of riflles, and both series of riiiles emanating from points directly adjacent to the feed end of the table and adjacent to the transverse line on which the feed means is disposed so that the first series of riiiies directly receive the feed at their rear ends and the riles of the second series receive material adjacent to theirrear ends as it overflows,transverselyV from the first series of rii'lies.

3. A concentrating table having one longitudinal side lower than the other for the discharge of tailings, one end of said table constituting a discharge for the concentrates, feed means at the opposite end of the table adjacent to the higher side thereof to deliver the material to be treated. a bank riffle extending from the feed end-of the table longitudinally of the latter and disposed ob- Aliquely `to incline upwardly toward the higher side, the top surface of said bank riftle sloping transversely to present a dip toward the lower side of the table, riiiies between said bank riifle and the higher side of the table.; and riliflesfon the table between said benk rifHe and, lower side -of the fable,

said bank riiile rising higher from the table than the other riiiles, and all of said riflles ranging generally lengthwise of the table from the feed end thereof in the general direction of the discharge for the concentrates.

4. A concentrating table, one end of which constitutes a discharge for the concentrates and one side of which constitutes a discharge for the tailings, feed means positioned to deliver material tothe table adjacent to that end opposite the discharge of the concern trates, a bank riiiie extending generally lon gitudinally of the table from the feed end thereof toward the opposite end, and presentng a top surface sloping transversely to present a dip toward the side at which the tailings are discharged, and rifHcs at each side of the bank riflle, said last men tioned rifl'les having their top surfaces in a single plane parallel with the table surface and ranging longitudinally of the table from the feed end thereof.

5. A concentrating table having one longitudinal side lower than the other for the discharge of tailings, one end of said table constituting the discharge for the concentrates, feed means transversely disposed at the opposite end of the table to deliver the material to be treated, a series of rifHcs disposed obliquely over that portion of the table adjacent to the higher side, to incline npwardly toward the higher side. those rifies of said series disposed increasing distances from the higher side of the table successively increasing in length, and a second series of ritlies on said table nearer the lower side ofthe table than the first series of riflles and approximately parallel with said lower side, said feed means being adjacent to the first-mentioned series of riflies, and both series of riiiles emanating from points directly adjacent to the feed end of the table and adjacent to the transverse line on which the feed means is disposed so that the rst series of riflies directly receive the feed at their rear ends and the riiiies of the second series receive material adjacent to their rear ends as it overliows transversely from the first series of riiiies.

, 6., A concentrating table, one longitudinal side of which constitutes a discharge for the tailings and one end of which constitutes a discharge for the concentrates, feed means transversely disposed at the other end of the table to deliver material to he treated, and riftles on said table, those riftles nearest the side of the table opposite the tailings discharge evtending oblieuely toward said opposite side. those of the oblique rilies which are disposed increasing distances from said opposite side being successively of increased lengths, and there being ritlles between said oblique riflles and that side of the table constituting the tailings discharge andi` extendingv substantially freni endj to end of the table, feed means being adc ja ent to the first-mentioned series of ritlies,

andboth series of rililes emanating from points directly adjacent to the feed end of i the table and adjacent tothe transverse line onv which the feed means is disposed .so that the lirst series of rifiles directly receive the feed at their rear ends and the riliies of the second series receive vmaterial adjacent to V'their rear ends as 1t overfiows transversely from the first series of rifties.

Y said bank ritlle and said opposite side of the table and extending obliquely towardsaid Vopposite side from the feed` end, and ritlles at an angle to the other riile's and disposed between the bank. rifile and the first-men tioned side of the table, said bank riiiie rising higher from the table than the other riffles, said feed means being); adjacent to the tirstsmentioned series of rililes, and both series of rifes emanating from points directlyV adjacent to the feed end of the table and adjacent to the transverse line on which the feed means is disposed so that the first series of ril'tles directly receive the feed at their rear ends and the riflies of the second series receive material adjacent to their rear ends as it overflows transversely from the Y- first series of rlliies.

8. A concentrating table, one longitudinal side of which constitutes a discharge for the tailings and one end of which vconstitutes a VVdischarge for the concentrates, feed means transversely disposed adjacentto the opposite end of the table and adjacent to the oppositeside from the first-mentioned slde to deliver the material to be treated, a bank rittle extending from adjacentl the feed'end of the table obliquely toward said opposite side, the top surface of said bank riflle sloping transverselyto present a dip towardjtne rst-mentioned side of the table, a series of ril'iles between said bank riflle and thefirstmentioned side of the table, and a series of riiies between said bank riflieand saidopposite side of the table, the two series of riiiies having their top surfaces in a single f plane parallel with the table surface; saidv feed meansbeing adjacent to the first-mentioned series Vof riliies, and bothfseries of vriiiesemanating frompoints; directly adjacent to the feed end of the table and adjacent to the transverse line on which the feed means is disposed so that the firstseries of ritlles directly receive the feed' at their rear ends and .the riflies of the second lseries Are ceive material adj acentto their rear ends as it overflowstransversely from? the lirst series ofrifiles.Y i

9L A concentrating table, one longitudinal side of Which constitutes" a discharge for the tailings and one end ofwhich constitutes a discharge forthe concentrates` feed means adjacent to the opposite end ofthe table and adjacent to theopposite side'from the firstmentioned side to deliver thematerial to he treated, a bank rifile extending from adjacent the feed end of the table obliquely tol ward said opposite side, a-series of rilfles disposed between the bank riflle and said'opV-V posite side of the table approximately parallelvwith said bank riliie, and a series of riliies disposed'on the table between'the bank Y ritlie and ythe first-'mentioned side of the table and parallel with the latter' side, the top surfaceof said bank riflle sloping' transversely to present aA dip toward the firstmentioned side ofthe table;

l0. A concentrating table, onelongitudinal side of which constitutes a discharge for the tailings and one end of which constitutes a discharge for the concentrates` feed means adjacentto the opposite end of the table and adjacentfto the opposite side from the irst mentioned side to deliver the material to be treated', a bank riffle extending from ad- Y Y jacent the feed end of the tableobliqueiy toward said opposite side, a series of Vriftles disposed between the bank rifile and said opposite side of the table approximately parallel with said bank riflie, and a series of ritfles disposed on the table between the bank riifle and the iirstfmentio'ned side of the table and'parallelwith the latter side','the top surface of saidbank riffle sloping transversely to present a dip toward Vthe first-mentioned side of the table, said feedrmeans being' ad,u jacent to the first-mentioned series of rifiles, and both seriesof riiiles "emanating from points directly adjacent tothe 'feed end Yof thetable and adjacent to the transverse line on which the feedmeans isdisposed so that the first series of riflies directly receive' the feed at their rear ends and the rifiles of the second series'receivematerial adjacent to, their rear ends as it overtiows transversely fromthe first series of riiiles. Y 11. A concentrating table, one' longitudinal side "of whichconstit'utes a discharge forl the tailingsfand one end of which consti- -tutes a discharge for the concentrates, feed means transversely disposed at Y the opposite end ofthetable and adjacent to thel opposite side from the first-mentioned`sideto deliver the material to' be treated, abank rifile extending from adjacent the feedrend of the table obliquely toward said opposite side, ritiles between said bank rifiie andV said opposite side 'of the table and extending obliquely toward saidopposite side from 130- the feed end, and riiiles at an angle to the other ritlles and disposed between the bank riilies and the iirst-mentioned side of the table, said bank riftle rising higher from the table than the other rifiies, the bank riiile and riiiles at each side thereof being of reduced height from the feed end of the table, said feed means being adjacent to the iirst-mentioned series of riiiies, and both series of riflles emanating from points directly adjacent to the feed end of the table and adjacent to the transverse line on which the feed means is disposed so that the first series of rii'llesv directly receive the feed at their rear ends and the riifles of the second series receive material adjacent to their rear ends as it overflows transversely from the iirst series of ritfles.

l2. A concentrating table of which one longitudinal side constitutes the discharge for the tailings and one end of the table constitutes a discharge for the concentrates, feed means transversely disposed adjacent to that end of the table opposite to the discharge end, a series of rifiles disposed over that portion of the table near the opposite side from the tailings discharge and extending obliquely from adjacent ythe end of the table opposite the concentrates discharge toward said opposite side; together with a bank rifiie substantially parallel with said first -mentioned rifes, and ritlles between said bank ritiie and the tailings discharge of the table, said last-mentioned riiiies being substantially parallel with the longitudinal axis of the table, said feed means being adjacent to the first-mentioned series of riiles, and both series of riti'les emanating from points directly adjacent to the. feed end of the table and adjacent to the transverse line on which the feed means is disposed so that the first series of riiiies directly receive the feed at their rear ends and the ritfles of the second series receive material adjacent to their rear ends as it overliows transversely from the first series of rilies.

13. A concentrating table of which one longitudinal side constitutes the discharge for the tailings and one end of the table constitutes a discharge for the concentrates, a series of riiiles disposed over that portion of the table near the opposite side from the tailings dis harge and extending oblquely from adjacent the end of the table opposite the concentrates discharge toward said opposite side; together with a bank ritlle substantially parallel with said irst-mentioned ritliles, and ritlies between said bank ritile and the tailings discharge of the table, said bank riiile having a top surface sloping toward the tailings discharge side of the table.

14. A concentrating table having one longitudinal side lower than the other for the discharge of tailings, one end of said table constituting a discharge for the concentrates, feed means at the opposite end of the table adjafent to the higher side thereof to deliver the material to be treated, a bank ritlle extending Jfrom the feed end of the table longitudinally of the table and disposed obliquely to incline upwardly toward the higher side, riflies between said bank rifHe and the higher side of the table, and riliies on the table between said bank riffie and the lower side of the table, said bankritlle rising higher from the table than the other ritlies and all of said rifles ranging generally lengthwise of the table from the feed end thereof in the general direction of the discharge for the concentrates.

JOHN FRANCIS MCNEIL. 

